Yamaha T8 Rigging Manual page 241

Outboard Rigging Guide - 2001
Wiring
Refer to the following illustrations for basic
wiring. For detailed wiring information, refer to
the diagrams in the Boat Wiring Diagrams in the
Electrical Section 3 of this manual.
NOTE: A special relay, Part number 6Y5-
81950-02-00, is required when using the Pro
Series analog tachometer with oil lights.
5-4
Tachometer